/**
 * Copyright (c) 2009 Teoti Graphix, LLC See:
 *     http://tkarchitecture.teotigraphix.org
 * 
 * Permission is hereby granted, free of charge, to any person
 * obtaining a copy of this software and associated documentation
 * files (the "Software"), to deal in the Software without
 * restriction, including without limitation the rights to use,
 * copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following
 * conditions:
 * 
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 * 
 * @author Michael Schmalle mschmalle@teotigraphix.com
 */
package org.teotigraphix.tka.core
{

import mx.styles.CSSSelector;
import mx.styles.CSSStyleDeclaration;
import mx.styles.StyleManager;

/**
 * The tka framework utility for commonly used methods
 * and other various functionality. 
 * 
 * @copyright Teoti Graphix, LLC
 * @author Michael Schmalle
 * @date 08-22-09
 */
public class TKAUtil
{
	/**
	 * Creates a type selector if undefined otherwise returns the
	 * selector's <code>CSSStyleDeclaration</code> instance.
	 * 
	 * @param selectorName A string indicating which type selector 
	 * to create or query.
	 * @param defaultFactory A function that will be used as a default factory.
	 * @return A <code>CSSStyleDeclaration</code> instance already registered with
	 * the StyleManager.
	 */
	public static function createSelector(
		selectorName:String, defaultFactory:Function):CSSStyleDeclaration
	{
		var selector:CSSSelector = new CSSSelector(selectorName, null, null);
		var style:CSSStyleDeclaration = StyleManager.getStyleDeclaration(selectorName);
		
		if (!style)
		{
		    style = new CSSStyleDeclaration(selector);
		}
		
		if (style.defaultFactory == null)
			style.defaultFactory = defaultFactory;
		
		StyleManager.setStyleDeclaration(selectorName, style, true);
		
		return style;
	}
}
}